Add skeletton to save traces.

backend/codiki-infrastructure/src/main/java/org/codiki/infrastructure/traffic/TrafficTraceInMemoryAdapter.java

@@ -0,0 +1,39 @@
+package org.codiki.infrastructure.traffic;
+
+import org.codiki.domain.traffic.model.TrafficTrace;
+import org.codiki.domain.traffic.port.TrafficTracePort;
+import org.springframework.stereotype.Component;
+
+import java.time.ZonedDateTime;
+import java.util.ArrayList;
+import java.util.List;
+
+@Component
+public class TrafficTraceInMemoryAdapter implements TrafficTracePort {
+    private final List<TrafficTrace> traces = new ArrayList<>();
+
+    @Override
+    public void save(TrafficTrace trace) {
+        traces.add(trace);
+    }
+
+    @Override
+    public List<TrafficTrace> getAllInPeriod(ZonedDateTime startDate, ZonedDateTime endDate) {
+        return List.of();
+    }
+
+    @Override
+    public List<TrafficTrace> getAllByCorrelationId(String correlationId) {
+        return List.of();
+    }
+
+    @Override
+    public Integer countAllInPeriod(ZonedDateTime startDate, ZonedDateTime endDate) {
+        return 0;
+    }
+
+    @Override
+    public Integer countByCorrelationId(String correlationId) {
+        return 0;
+    }
+}